IfcSweptAreaSolid

Semantic definitions at the entity

Entity definition

An IfcSweptAreaSolid represents the 3D shape by a sweeping representation scheme allowing a two dimensional planar cross section to sweep through space.

The swept area is defined by a cross section, represented by a subtype if IfcProfileDef, that is provided as a closed two-dimensional boundary on an implicit plane. The swept area is defined in the xy plane of the object coordinate system. The sweeping operation is applied to the swept area as defined within the subtypes of IfcSweptAreaSolid, some subtypes require an implicit transformation of the swept area to the start position of the sweep.

The optional _Positio_n coordinate system allows for re-positioning the resulting swept solid relative to the object coordinate system.

NOTE Definition according to ISO/CD 10303-42:1992
The swept area solid entity collects the entities which are defined procedurally by sweeping action on planar bounded surfaces. The position is space of the swept solid will be dependent upon the position of the swept area. The swept area will be a face of the resulting swept area solid, except for the case of a revolved area solid with angle equal to 2π (or 360 degrees).

NOTE Entity adapted from swept_area_solid defined in ISO 10303-42.

HISTORY New entity in IFC1.5

IFC4 CHANGE The attribute Position has been changed to OPTIONAL with upward compatibility for file-based exchange.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	SweptArea	IfcProfileDef		The surface defining the area to be swept. It is given as a profile definition within the xy plane of the position coordinate system.	X
2	Position	IfcAxis2Placement3D	?	Position coordinate system for the resulting swept solid of the sweeping operation. The position coordinate system allows for re-positioning of the swept solid. If not provided, the swept solid remains within the position as determined by the cross section or by the directrix used for the sweeping operation. IFC4 CHANGE The attribute has been changed to OPTIONAL with upward compatibility for file-based exchange.	X

Formal Propositions

Rule	Description
SweptAreaType	The profile definition for the swept area solid shall be of type AREA.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRepresentationItem
	LayerAssignment	IfcPresentationLayerAssignment @AssignedItems	S[0:1]	Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items. IFC2x3 CHANGE The inverse attribute LayerAssignments has been added. IFC4 CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.	X
	StyledByItem	IfcStyledItem @Item	S[0:1]	Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. IFC2x3 CHANGE The inverse attribute StyledByItem has been added.	X
IfcGeometricRepresentationItem
IfcSolidModel
	Dim :=3	IfcDimensionCount		The space dimensionality of this class, it is always 3.	X
IfcSweptAreaSolid
1	SweptArea	IfcProfileDef		The surface defining the area to be swept. It is given as a profile definition within the xy plane of the position coordinate system.	X
2	Position	IfcAxis2Placement3D	?	Position coordinate system for the resulting swept solid of the sweeping operation. The position coordinate system allows for re-positioning of the swept solid. If not provided, the swept solid remains within the position as determined by the cross section or by the directrix used for the sweeping operation. IFC4 CHANGE The attribute has been changed to OPTIONAL with upward compatibility for file-based exchange.	X

Formal representations

XML Specification

 <xs:element name="IfcSweptAreaSolid" type="ifc:IfcSweptAreaSolid" abstract="true" substitutionGroup="ifc:IfcSolidModel" nillable="true"/>

 <xs:complexType name="IfcSweptAreaSolid" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:IfcSolidModel">

    <xs:sequence>

     <xs:element name="SweptArea" type="ifc:IfcProfileDef" nillable="true"/>

     <xs:element name="Position" type="ifc:IfcAxis2Placement3D" nillable="true" minOccurs="0"/>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcSweptAreaSolid

 ABSTRACT SUPERTYPE OF(ONEOF(IfcDirectrixCurveSweptAreaSolid, IfcExtrudedAreaSolid, IfcRevolvedAreaSolid))

 SUBTYPE OF (IfcSolidModel);

  SweptArea : IfcProfileDef;

  Position : OPTIONAL IfcAxis2Placement3D;

 WHERE

  SweptAreaType : SweptArea.ProfileType = IfcProfileTypeEnum.Area;
END_ENTITY;

 EXPRESS-G diagram

	Festkörper - Entlang einem Pfad extrudiert
	Swept Area Solid